Aluminum Hypophosphite versus Alkyl-Substituted Phosphinate in Polyamide 6: Flame Retardance, Thermal Degradation, and Pyrolysis Behavior

2013 ◽  
Vol 52 (8) ◽  
pp. 2875-2886 ◽  
Author(s):  
Bin Zhao ◽  
Li Chen ◽  
Jia-Wei Long ◽  
Hong-Bing Chen ◽  
Yu-Zhong Wang
Keyword(s):  
Thermal Degradation ◽  
Polyamide 6 ◽  
Flame Retardance ◽  
Pyrolysis Behavior ◽  
Aluminum Hypophosphite

Thermal Degradation and Flame Retardance of Biobased Polylactide Composites Based on Aluminum Hypophosphite

2012 ◽  
Vol 51 (37) ◽  
pp. 12009-12016 ◽  
Author(s):  
Gang Tang ◽  
Xin Wang ◽  
Weiyi Xing ◽  
Ping Zhang ◽  
Bibo Wang ◽  
...  
Keyword(s):  
Thermal Degradation ◽  
Flame Retardance ◽  
Aluminum Hypophosphite

Aluminum hypophosphite and aluminum phenylphosphinate: A comprehensive comparison of chemical interaction during pyrolysis in flame-retarded glass-fiber-reinforced polyamide 6

2019 ◽  
Vol 37 (3) ◽  
pp. 193-212
Author(s):  
Xi Cheng ◽  
Jianming Wu ◽  
Chenguang Yao ◽  
Guisheng Yang
Keyword(s):  
Heat Release ◽  
Glass Fiber ◽  
Chemical Interaction ◽  
Fire Behavior ◽  
Polyamide 6 ◽  
Fiber Reinforced ◽  
Limiting Oxygen Index ◽  
Glass Fiber Reinforced ◽  
Flame Retarded ◽  
Aluminum Hypophosphite

This study compared thermal degradation, pyrolysis behavior, and the fire behavior of flame-retarded glass-fiber-reinforced polyamide 6 with aluminum hypophosphite and aluminum phenylphosphinate (BPA-Al), respectively. We sythesize aluminum phenylphosphinate by benzenephosphinic acid (BPA) and AlCl3.6H2O in water. so we call aluminum phenylphosphinate BPA-Al for short. The dependence of limiting oxygen index on phosphorus content was linear for aluminum hypophosphite and BPA-Al. Thermogravimetric analysis proved aluminum hypophosphite was less stable than BPA-Al. Thermogravimetric-Fourier transform infrared tests showed that aluminum hypophosphite system balanced the charring process and the gas releasing well, and that BPA-Al system enhanced the charring process and decreased the gas releasing. Peak heat release rate and total heat release data proved that aluminum hypophosphite system was superior to BPA-Al system in lowering the heat release. Their differences were caused by different P-H (aluminum hypophosphite) and P-phenyl (BPA-Al) structures. P-H structure did better than P-phenyl structure in balancing the condensed phase effect and the gaseous phase action. So P-H structure (aluminum hypophosphite) was more suitable than P-phenyl structure (BPA-Al) in the flame retardancy of glass-fiber-reinforced polyamide 6.

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